When a newly opened cave system begins swallowing workers, hunters, and travelers alike, fear spreads quickly through the nearby settlement. The few who escape speak of foul-smelling reptilian raiders lurking in the dark—savage things that strike from narrow tunnels, drag off the living, and vanish back below before help can arrive. With each passing day, the attacks grow bolder, and those taken alive have yet to return.

Hired to end the threat before it grows worse, the adventurers are sent into the caves to rescue any survivors and destroy whatever has gathered beneath the earth